Problems with the 12 V battery on Mazda: affected models and engines
In 3 models from Mazda there are 3 documented faults with the 12 V battery. The most important: 12 V battery going flat while parked, the m-hybrid system can drain or damage the 12 V battery and 12V battery goes flat overnight or lasts only a short time.
Documented faults, from most to least important
Severity × frequency. Below each one, the Mazda models it appears in.
In 2 Hybrid
By Mazda model
Open yours to see only the faults that affect it, by engine and by year.
Engines and gearboxes involved
Parts for your Mazda for faults with the 12 V battery
Add the model and engine in the shop, or better still the registration plate or VIN, to see only the parts that fit.
Affiliate links: if you buy from these shops, MotorFiable may receive a commission at no cost to you. Check compatibility against the registration plate or VIN before ordering. Affiliate links
Frequently asked questions
What faults with the 12 V battery do Mazda cars have?
In 3 models from Mazda there are 3 documented faults with the 12 V battery. The most important: 12 V battery going flat while parked, the m-hybrid system can drain or damage the 12 V battery and 12V battery goes flat overnight or lasts only a short time. Each fault has its own page with the affected years and versions, the symptoms and the repair cost.
Which Mazda models have the most problems with the 12 V battery?
Mazda 3 IV (1 fault), Mazda CX-30 (1 fault) and Mazda 2 Hybrid (1 fault).
Which Mazda engines have faults with the 12 V battery?
1.5 Hybrid (1 fault).